The other day, I had the joy of taking my eldest daughter to a theme park (Chessington World of Adventures). We had an amazing time, finished off with a visit to what I thought was a sort of soft play area.
It turns out it was way more awesome than that. It was a steam punk themed ball shooting arena called Temple of Mayhem.
The arena was 2 floors high, with walkways laid out in a horseshoe around the edges. Each of the walkways had a bank of guns, whilst the ground floor had 2 large cannons.
The guns and the cannons fired tennis ball sized foam balls (as many as you could get in them). Also dotted around were various mechanisms to get the foam balls from the ground floor up to the first and second levels.